package com.ctz.commonframe.utils;

import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.provider.MediaStore;
import android.text.TextUtils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

public class BitmapUtil {

    public static Bitmap getCompressBitmap() {
        return null;
    }

    public Bitmap getimage(Context context, String srcPath, float screenWidth, float screenHeight) {
        if (TextUtils.isEmpty(srcPath)) return null;
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        // 开始读入图片，此时把options.inJustDecodeBounds 设回true了
        newOpts.inJustDecodeBounds = true;
        Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);// 此时返回bm为空
        int w = newOpts.outWidth;
        int h = newOpts.outHeight;
        // 缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可
        int be = 1;// be=1表示不缩放
        if (w > h && w > screenWidth) {// 如果宽度大的话根据宽度固定大小缩放
            be = (int) (newOpts.outWidth / screenWidth);
        } else if (w < h && h > screenHeight) {// 如果高度高的话根据宽度固定大小缩放
            be = (int) (newOpts.outHeight / screenHeight);
        }
        if (be <= 0)
            be = 1;
        newOpts.inSampleSize = be;// 设置缩放比例
        // 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
        newOpts.inJustDecodeBounds = false;
        bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
        return compressImage(context, bitmap);// 压缩好比例大小后再进行质量压缩
    }

    private Bitmap compressImage(Context context, Bitmap image) {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);// 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
        int options = 100;
        while (baos.toByteArray().length / 1024 > 100) { // 循环判断如果压缩后图片是否大于100kb,大于继续压缩
            baos.reset();// 重置baos即清空baos
            image.compress(Bitmap.CompressFormat.JPEG, options, baos);// 这里压缩options%，把压缩后的数据存放到baos中
            options -= 10;// 每次都减少10
        }
        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());// 把压缩后的数据baos存放到ByteArrayInputStream中
        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);// 把ByteArrayInputStream数据生成图片
        return bitmap;
    }

    public String getAbsoluteImagePath(Context context, Uri uri) {
        String[] proj = { MediaStore.Images.Media.DATA };
        Cursor cursor = context.getContentResolver().query(uri, proj, // Which columns to return
                null, // WHERE clause; which rows to return (all rows)
                null, // WHERE clause selection arguments (none)
                null); // Order-by clause (ascending by name)

        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }
}
